MG

Michael Shane Grigg

MA Marshalltown: 2 patents #12 of 23Top 55%
Overall (All Time): #1,811,711 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
11686114 Power head for powered concrete roller screed Charles Henry Cowie 2023-06-27
11111681 Power head for powered concrete roller screed Charles Henry Cowie 2021-09-07